Caesar Cipher
Shifts letters along the alphabet in both directions. The Russian alphabet works alongside Latin, and an unknown shift in someone else's cipher is found automatically.
The Russian alphabet shifts within its own circle, the Latin one within its own.
Letters can be Russian or Latin: the key repeats across the whole length of the text.
Usually it is treated the same as е: that is how almost every textbook does it.
0 characters · 0 letters
Encrypted text
Variants that look like real text
by letter frequencySuetonius wrote that Julius Caesar shifted letters by three positions: he wrote "D" in place of "A". The technique has survived two thousand years and lives on in school exercises and puzzles.
It offers no real security: the Russian alphabet has only 32 possible shifts, the Latin alphabet 26. You can try them all by hand in a couple of minutes, so the decoding mode here has a "Guess the shift" button — it runs through the shifts at once and puts the variants that look like readable text at the top.
The famous ROT13 is the same cipher with a shift of 13. It works neatly on the Latin alphabet because applying it twice returns the original text: the alphabet has 26 letters, and half of that is exactly 13.
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